Abstract #3830

Performance of an aerosol jet-deposited wireless resonant marker: in vitro temperature measurements and in vivo visualization

Caroline D. Jordan¹, Bradford R. H. Thorne¹, Arjun Wadhwa², Eugene Ozhinsky¹, Vincent Fratello², Sravani Kondapavulur^1,3,4, Aaron D. Losey¹, Teri Moore¹, Carol Stillson¹, Colin Yee¹, Ronald D. Watkins⁵, Greig C. Scott⁶, Alastair J. Martin¹, Xiaoliang Zhang¹, Mark W. Wilson¹, and Steven W. Hetts¹

¹Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, CA, United States, ²Quest Integrated, Kent, WA, United States, ³Graduate Program in Bioengineering, UC Berkeley-UCSF, Berkeley, CA, United States, ⁴Bioengineering and Therapeutic Sciences, University of California, Berkeley, Berkeley, CA, United States, ⁵Radiology, Stanford University, Stanford, CA, United States, ⁶Electrical Engineering, Stanford University, Stanford, CA, United States

Endovascular catheter-based procedures under MRI can be challenging as standard fabrication methods for markers are rigid and bulky, and new microfabrication methods need more analysis on their tracking characteristics. We analyzed a wireless resonant circuit tracking marker that was printed using aerosol jet deposition on a polymer catheter. In a phantom, we acquired bSSFP sequences and a B₁+ map, and measured temperature using probes and MR thermometry. In vivo, in the carotid arteries, we acquired GRE sequences and a B₁+ map. The marker demonstrated good signal, with minimal temperature increases, suggesting that these markers have good tracking characteristics.

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